I should probably have added that you'll want to use a non-polarized cap with an adequate voltage rating.
For a 48V system, you could use these:
http://www.radioshack.com/product/index.jsp?productId=12401428
-Tom
--- In electricboats@yahoogroups.com, "Tom" <boat_works@...> wrote:
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>
>
>
> Assuming a brushed motor is the source of the noise, I'd start by installing a .1 uF capacitor across the motor terminals, as close to the enclosure as possible.
>
> That should make a big improvement. If you need more filtering you can add two additional caps, this time from each terminal to the enclosure.
>
> -Tom
>
> --- In electricboats@yahoogroups.com, danbollinger <no_reply@> wrote:
> >
> > Like Kirk mentioned, it could be RF noise from your brushes/commutator. The make/break can cause interference, just like arc welders can. Or, it could be from a high frequency variable noise. VF drives are known culprits. One solution is to make sure your radio and motor have separate grounds. Also, and you probably know this already, install an RF filter on your radio's power supply.
> >
> > --- In electricboats@yahoogroups.com, "Cornelis" <cvr@> wrote:
> > >
> > > When I run my motor I get interference on my VHF radio, a whiney high pitched noise. Other boats near me get it too.
> > > Does anybody else experience this, any suggestions what I can do about it?
> > >
> >
>
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